Long debated subject. I take leaf anytime throughout the whole grow. If leaf is blocking growth below I remove it.
Some go nuts with it. Just use common sense. Them leave you remove will be replaced pretty quickly. I prob remove a lb of leaf per cycle in my big tent. But looking at them you'd think I don't.
An example of before n after leaf removal. I use floater screens so leaf removal is important for air flow and light penetration.
Cannabis is a super tough plant. You will not stunt growth or harm the plant. If anything your manipulating it to get the most ya can from the plant.